M E Chani Ca L Ch Ec K S And Adjustments; Checking The Take-Up Force And Winding Force; Adjusting The Take-Up Force - TANDBERG 3400 X Service Manual

A
3.
3.2
3.1
M E CHANI CA L CH EC K S AND
ADJUSTMENTS
CH E CK ING TH E T A K E - U P FO R CE A ND
W IN DIN G F O RC E
Fig. 3.1
Checking the winding force.
A 7" reel with a hole drilled in it 80 mm from the
hub hole is required together with a torque gauge.
Insert the leg of the torque gauge into the drilled
hole. The reel should be allowed to rotate slowly
in the direction of the clutch torque while the
measurements are performed to obtain the speci-
fied values. see table 3.2.
ADJUSTING THE TAKE-UP FORCE
Fig. 3.3
Adjusting the take-up force.
NOTE ! Do not touche the textile side of the
belt with your fingers.
The rubber drive belt does not move during normal
forward drive. This is because a textile belt pro-
vides the take-up force via a drive wheel mounted
behind the take-up turntable.
Adjust the take-up force by moving the spring, see
Figure 3.3.
If the winding force is not correct it should be
adjusted as explained on the next page.
]
Turntable Operating lever
position
Playback or
wind force
Rieht
2 5- 3 0 e *
Right
>>
9o-2so g*
Left 90 - 2 50 p*
Table 3.2
Clutch torque
x It is normal for the winding force
to increase
20-30% after the machine has been in conrinuous
operation for some time.
O